house302

I have a broken bolt that i cant get out and was attempting to drill it out, but then the drill bit broke. Should i just get a different drill bit and drill the hole again or get a bigger drill bit and then tap it and use heli coil? ANY INFO WOULD BE GREATLY APPRECIATED!!!!!!

HACKGT350

you must have had one ****ty drill bit to break like that. go get a new one drill it out tap it and heli coil it

house302

thanks thats what i figured, but i wanted to make sure.

mjr46

drill slow and drill a pilot hole and then use the proper drill bit for the heli-coil kit after that and tap it then install heli-coil

WhiteWindsor

What mjr said. Make sure to do it right.

gothand

Why not use an easy-out?

Jeff

my77stang

cause easy outs usually break off and then you gotta get them out too. ask me how i know[:@]

house302

I did a heli coil in school, but that was 3months ago and i have learned alot of other things since then so i need a refresher. I drill the hole out bigger for the heli-coil, but i can use the same size bolt that was in there previously right.

my77stang

yes, you drill out the hole with the right sized bit - it will pretty much remove any traces of old threads. then you tap the hole with a helicoil tap and screw in the insert which resizes the hole back to the original size. dont forget to knock out the little tang at the bottom of the insert once installed, you can just stick anything down in there and give it a quick whack, then use an airgun to blow it out of the hole.

1995mustang818

same thing happend to me but i just broke the head off so i just heated the head and the bolt with a heat gun and while some one had the heat gun in there i tapped it out little by little with a small punch and it came out hope this helps